CDL Combination Vehicles TestDriving Combination Vehicles SafelyEasy
A commercial driver is operating a combination vehicle and is preparing to make a left turn at an intersection. To ensure adequate clearance and prevent cutting the corner, what is the most appropriate steering technique?
- AStay as far right as possible throughout the approach and turn, then correct as needed.
- BApproach the intersection close to the centerline or left side of the lane, then turn left.
- CSwing wide to the right before starting the turn, then make a sharp left.
- DInitiate the turn by immediately pulling the steering wheel sharply to the left.
Show answer & explanationAnswer & explanation
Correct answer: B. Approach the intersection close to the centerline or left side of the lane, then turn left.
For a left turn in a combination vehicle, approaching close to the centerline allows the vehicle to make a wider sweep, preventing the trailer from cutting the corner and hitting curbs or other vehicles.
Why the other options are wrong
- A. Staying far right throughout a left turn will force the trailer to cut sharply, potentially hitting objects or other lanes.
- C. Swinging wide to the right before a left turn is a technique for right turns, not left turns, and can confuse other drivers or lead to collisions.
- D. Turning sharply immediately will likely cause the trailer to cut the corner.
Combination Vehicle Left Turns
To safely execute a left turn with a combination vehicle, position the vehicle to allow the trailer sufficient clearance without cutting the corner.
- Approach close to the centerline or left side of your lane.
- This provides a wider turning radius for the trailer.
- Prevents the trailer from hitting curbs or vehicles in adjacent lanes.
Memory trick: Left turns need space, hug the line, don't cut the trace.